html,
body {
  font-family: Helvetica, STHeiti, Microsoft YaHei, Verdana, Arial, Tahoma, sans-serif;
  margin: 0;
  border: 0;
  padding: 0;
  color: #2c3a46;
  background: #fff;
  font-size: 14px;
  line-height: 1.6em;
}

html {
  position: relative
}

a,
abbr,
acronym,
address,
applet,
article,
aside,
audio,
b,
big,
blockquote,
canvas,
caption,
center,
cite,
code,
dd,
del,
details,
dfn,
div,
dl,
dt,
em,
embed,
fieldset,
figcaption,
figure,
footer,
form,
h1,
h2,
h3,
h4,
h5,
h6,
header,
hgroup,
i,
iframe,
img,
ins,
kbd,
label,
legend,
li,
mark,
menu,
nav,
object,
ol,
output,
p,
pre,
q,
ruby,
s,
samp,
section,
small,
span,
strike,
strong,
sub,
summary,
sup,
table,
tbody,
td,
tfoot,
th,
thead,
time,
tr,
tt,
u,
ul,
var,
video {
  margin: 0;
  padding: 0;
  border: 0;
  font: inherit;
  font-size: 100%;
  vertical-align: baseline
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
summary {
  display: block
}

ol,
ul {
  list-style: none
}

table {
  border-collapse: collapse;
  border-spacing: 0
}

caption,
td,
th {
  font-weight: 400;
  vertical-align: middle
}

.clearfix::after {
  content: "";
  display: block;
  clear: both;
}

.float-l{
  float: left;
}

.float-r{
  float: right;
}

a img {
  border: none
}

a {
  color: #07d;
  text-decoration: none
}

.orange {
  color: #f60
}

.dark-gray {
  color: #666
}

.gray {
  color: #999
}

.green {
  color: #4b0
}

.red {
  color: #f30
}

.container {
  width: 320px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .container {
    width: 420px;
  }
}
